Some of my most vivid childhood memories are running wild through Laumeier Sculpture Park outside St. Louis, Missouri, with a pack of siblings and cousins. The 105-acre park is more like an open-air museum dotted with sculptures that tower 65 feet into the air and holes that fall several feet into the dirt.

As we played tag and turned the abstract pieces of art into our pirate ships and dungeons, we were acutely aware of the absence of “no touching” signs on many of the sculptures. No sign meant climbing or hanging wasn’t against the rules, right?

Looking back, I’m certain these memories stay in sharp focus because our play had an element of risk. Not danger, really—only a sense of exhilaration when climbing and sliding on sculptures slightly taller and unfamiliar than I was used to.